exam Maths Puzzle Numerical Ability

-4(2.5x+8.7)=(1.4-9.2x)(6)

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exam Other Question

Chords AB and CD intersect at point E within a circle; AE=9 and EB=1

a) If CD=6 and CE=x, what expression represents ED in terms of x

B) Find CE

c) Find ED The cost of producing a number of items x is given by
C = mx + b, in which b is the fixed cost and m is the variable cost (the cost of producing one more item).
A) If the fixed cost is $40 and the variable cost is $10, write the cost equation.